Thank you for posting in the Community. I can help you move a vendor to a contractor.
You can add the contractors the same as the vendors. As mentioned by our Established Backers, the only distinct feature is the Track payments for 1099 box that needs to be marked. Here's how you can move a vendor to a contractor:
Click the vendor name.
Put a check mark on the Track Payment for 1099 box.
For additional insights, please check these articles: